High pressure valve or cock



July 9, i935..l w. D. SHAF'FER Er A1. 2,0@764 HIGH PRESSURE' VALVE ORCOCK FiledAug. 27, 1934 A .i f AT ORN Patented July 9, 1935 PATENrorties man PRESSURE VALVE oa cock VWilliam l). Shaffer and Alfred LeeCone, Brea, Calif.; said Cone assignor to 'said Shaffer sanitationAugustzfz, issgseiai No. 741,550

. 4 Claims.

This `invention isa valve or cock of the high pressure type, somewhat ofthe kind shownin Swanson Patent No. 1,927,855. Y

This patent shows rotary core 1 in which is a 5 radially slidableclosure 9 which lturns with and by action of the core to open or closetheshell ports;the `core-and the closure having a through hole for flow..The patent shows a means for initially crackingv or slightly openingthe sliding closure Si to ease valve opening effort under high pressure.This structure is rather expensive and has otherr characteristics whichwe aim to avoid by the invention of our instant disclosure.

We have found that it is possible to eliminate the eccentric sterndevice of Swanson and to effect a cracking of the closureby merelyapplying, on one corner of the closure, an effort which is angular to oris in an arc about the axis of the closure which is coaxialwith thevalve port axis. l

Since the closure has a sealing face which is concentric with and sitson a mutual concaved shell bore (transverse to the port axis) it will beclear that any eifort which tends to twist the closure about its (port)axis then the closure will, inY making the slightest movement, breakconformity with its shell seat and a leak will result in the port. Theaction can be physically demonstrated by merely lapping one hand overthe 'back of the other in concentric position and then relativelytwisting one hand on the other about an axis through the lapped hands.

To illustrate in Swanson, if one of the side walls of the core l nexttothe closure 9 be cut back to relieve the core, and if any side wall isso cut that it will come into contact with a corner diagonal to the axisof the flow port then the eifort of contact of such corner will be totwist the closure from its concave seat, as will be fully set outhereinafter.

Briefly it is an object of the invention to provide, in a valve with aclosure having a convex face to close on a like concave seat, means totwist the closure off of its seat to crack the port slightly to relievehigh pressure on the closure.

The invention consists in certain advancements in this art as set forthin the ensuing disclosure and having, with the above, additional objectsand advantages as hereinafter developed, and whose construction,combination and details of means, and the manner of operation will bemade manifest in the description of the herewith illustrativeembodiment; it being understood that modications, variations andadaptations may be resorted to within the scope, principle and (CL.251-f-l0'2) spirit of the invention as it is more directly claimedhereinafter.

Figure l is a stem-axial section of the valve; some parts being inelevation, and

Figure 2'is a section on the port-axis of `the valve.

Figure 3 is aside elevation of the removed valve stem and core, and

Figure l is a plan thereof.

Figure 5 is a perspective of a removed port closure.

Figure 6 is a rear elevation of a modified form of the closure and itstwisting agent, (the latter in section) and Y i Figure 7 is a section online l-l, Fig. 6. The valve includesa shell 2 with opposite fittingports 3 4 and a bored chamber 5 closed at the top by a cap 6 having agland box l and a follower S.

Passing through the-gland is the stem 9 of a ported core il! which isconcentric to, but clear of, the shell bore wall so as to turn withoutcontact therewith. Opposite sides of the core are recessed back toprovide chordal faces ili2, Fig. 4.

1n each recess is disposed a segmental blockY I3 of rectangular facialplan and whose curved face lli is on an arc of thesame radius as that ofthe valve shell bore so that, under outward pressure the blocks,hereafter called the closure, will seat true on the bore and when inposition over the valve ports 3 4 will seal the same. But the depth ofthe closure is such that it may shift back toward the chordal face (li-l2) and thus open the port a crack to break resistance of contactbefore the closure is turned by its core I0.

Since the closure face lil is of the same radius as the seat or bore, ifa force F, Fig. 3, is applied on a corner as C, Fig. 5, the moment offorce on radius R of the port axis of the closure exerts awrenching-that is, a twisting reactionin the closure, to turn it, so tosay, on its seat. Since the seat is cylindrically concaved and sincetheV face I4 of the closure i3 is complementally convexed the result ofthe effort is that the closure bucks back into the recess of the corebody enough to allow a leakage of fluid past the closure. This leakagetherefore breaks physical face-to-face contact of the closure on theseat and provides for a relatively easy rotation of the valve stem 50and core, carrying with it the now freed closures.

The action is clearly shown in Figs. 6 and 7 which shows an embodimentwherein the core IDX has a lug 25 lying in a back cavity of a closurel3a, one corner 25*3L of the lug being advanced as 5 to its relativeside corner 25b (as to the near side wall I3b of the closure) so thatthe two corners 253--25b do not simultaneously abut the side I3 of theclosure, but one corner as 25a, engages in advance of the other andtends to twist the closure olf of its seat as indicated by dotted arrowT.

As soon as the twist is effected then both corners 25--25b actconjointly to turn the closure bodily with rotation of the core IDX.

(Swanson, supra, shows means to forcibly pull the closure straight backagainst the fluid pressure. In the present invention no such pull-backeffort to lift the closure clear is intended-it is important to notethat the effort to twist the closure is made and done while the closureis under load and is in contact with its concave seat. The action islikened to rolling a. log up a hill instead of actually lifting it fromthe ground and transporting it.)

In Figs. 1, 3 and 4, the core I0 has upper and lower shoulders lila-IIIbat one side of each chordal face I I-I2; one of the lugs having itsclosure abutting face I c slightly in advance (in direction of forcearrow F) of the face Ind of the other lug; the advance or lead beingindicated schematically at L, Fig. 3.

It will be noted that the faces IDC-I0d lie perpendicular to the chordalfaces II-I2, as in the Swanson device, and exert a straight push againstthe closures, during valve opening rotation.

The core has, opposite to the lugs Illa-|01), a straight row ofpyramidal spurs I5 forming an abutment for the near side I3x of theclosure I3 and by which this is pushed to closing position over itsvalve port. The spaces between the spurs of the row are to provide forwash-out of particles between the core faces I I--I2V and the relativeclosures to keep the valve clear.

If desired light springs I 6 may be used to thrust the closures outwardtoward the shell wall.

A suitable stop-lug I8 is provided on the core to limit action of thecore in the shell.

A ground, quarter-round section washer I9 is placed between the top ofthe core and the shell cap to reduce leakage tendency under very highpressures.

What is claimed is:

1. In a high pressure Valve or cock; a shell having a cylindrical borechamber and flow ports" leading thereto; and a valve core turnable inthe chamber without wall contact, and provided with closures havingouter faces concentric with and to close tight on the cylindrical wallbore at the ports and close the same; said closures and the core havingopposed abutment faces which are so disposed that in opening rotation ofthe valve core an angular or twisting eifort in a line transverse to theconcentric faces is applied to the closures, to relatively turn them asto the axis of the seats while in place thereon.

2. In a high pressure valve or cock; a shell having a bore chamberforming cylindrical concaved seats and flow ports leading thereto; and avalve core turnable in the chamber without Wall contact, and providedwith closures having convex outer faces concentric with and to closetight on the wall bore seats at the ports and close the same; saidclosures and the core having opposed abutment faces which are sodisposed that in opening rotation of the valve core an angular ortwisting effort is applied to the closures, to relatively turn them astothe axis of the seats while in place thereon.

3. In a valve or cock, a shell having a bore chamber with a flow portleading thereto, and a valve core turnable in said chamber; said corecarrying a radially movable port closure seating at the port and havingabutment means to engage the seated closure and exert an effort to twistthe closure on and relative to its seat at the port, whereby to breakfluid pressure on the closure; said closure and its seat in the borehaving concentric facial contour about'the axis of the core.

4. In a valve of the class described, a core part having a radiallymovable port closure part, said parts having mutually engaging abutmentsso disposed as to initially exert a twisting effort during opening turnof the core, on the seated valve and turn it as to the port axis of theclosure; the seating face of the closure being convex and concentric tothe axis of the core part and adapted to seat on a complementary portseat in the valve shell.

WILLIAM D. SHAFFER. ALFRED LEE CONE.

